Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.
College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.
Mar Pollut Bull. 2024 Aug;205:116600. doi: 10.1016/j.marpolbul.2024.116600. Epub 2024 Jun 18.
The sorption behavior of phosphorus on marine sediments in the presence of black carbon derived from fly ash (FC) was studied. For both the FC and sediment samples, the kinetic curves could be described by a two-compartment first order equation, and the isotherms fit the Freundlich and Langmuir models well. The high specific surface area with abundant acidic functional groups of FC promoted the sorption and make this process more irreversible. The effects were more significant with higher amount of FC added. After sorption, more significant increase in Ex-P, Fe/Al-P and CaP was found in the sediment with FC added, while the organic groups in FC rarely react with phosphorus to form OP. The pH of medium influenced the sorption character, and FC promoted the process significantly at pH < pH. The sorption was endothermic with an increase in randomness. The presence of FC had little effects on the thermodynamic parameters.
研究了在飞灰衍生的黑碳（FC）存在的情况下，磷在海洋沉积物上的吸附行为。对于 FC 和沉积物样品，动力学曲线都可以用两室一级方程来描述，等温线很好地拟合了 Freundlich 和 Langmuir 模型。FC 具有高比表面积和丰富的酸性官能团，促进了磷的吸附，使这一过程更加不可逆。添加更多的 FC 会产生更显著的影响。吸附后，添加 FC 的沉积物中 Ex-P、Fe/Al-P 和 CaP 的增加更为显著，而 FC 中的有机基团很少与磷反应形成 OP。介质的 pH 值影响吸附特性，在 pH < pH 时，FC 显著促进了这一过程。吸附是吸热的，无序度增加。FC 的存在对热力学参数几乎没有影响。
